FRISCO, Texas - Frisco police are searching for a missing woman and her three children who were last seen on Monday.

Brandon Woo said he last saw his wife and kids before leaving for work that morning.

“I kissed them goodbye as I always do, went out the door like I always do, come home that day and they were gone. Not there,” he said.

He reported them missing on Tuesday after checking with family members. He said he waited 24 hours because he thought that’s what he was supposed to do.

Police determined Christine Woo used her credit card around 9:45 a.m. Monday at a Walgreens store not far from her home. Three hours later, she and the kids were spotted on surveillance video at McDonalds.

There have been no new charges or withdrawals from her bank account since then, police said. Her husband also said he found her cellphone at home.

Police have no history of problems at the home. They are also not aware of any medical conditions, mental conditions or marital issues that may have prompted Christine to leave.

“We have no evidence or information that leads us to believe they are in any danger. We’re just obviously concerned. They have not been heard from in a few days and we’re looking to locate them and check on their welfare,” said Jeff Inmon with the Frisco Police Department.

Brandon said he and his wife were high school sweethearts and have been married for 10 years.

“I might show a brave front, but I tell you I'm tearing up inside,” he said. “I have to be realistic and prepare myself for the worst.”

Christine is described as a 39-year-old Asian female who is 5 feet 3 inches tall and about 120 pounds. She has black hair and brown eyes.

The children – a 1-year-old girl, 3-year-old boy and 5-year-old girl – are believed to be with her. They may be in a silver 2011 Honda Pilot with the Texas license plate BT3-D662.

Anyone with information about their whereabouts is urged to call the Frisco Police Department at 972-292-6010.